/*
* Copyright [2021] JD.com, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "../timer/timer_list.h"
#include "list/list.h"

class KeyHelper {
    public:
	KeyHelper(int keysize, int timeout);
	~KeyHelper();

	void add_key(unsigned long barrier_hash, const char *ptrKey);
	bool in_set(unsigned long barrier_hash, const char *ptrKey);

    private:
	void try_expire(void);

    private:
	enum { HASHBASE = 65536 };
	int keySize;
	int timeout;
	struct list_head hashList[HASHBASE];
	struct list_head lru;
	int (*keycmp)(const char *a, const char *b, int ks);

	struct keyslot {
		struct list_head hlist;
		struct list_head tlist;
		unsigned int timestamp;
		char data[0];
	} __attribute__((__aligned__(1)));
};
